FrameworkElement GetAdornerRoot(DependencyObject d)
{
var ret = VisualTreeHelperExtension.Ancestors(d)
.OfType <FrameworkElement>()
.Reverse()
.FirstOrDefault(x => AdornerLayer.GetAdornerLayer(x) != null);
return(ret);
}
private void OnDragDelta(object sender, DragDeltaEventArgs e)
{
if (Target == null)
{
return;
}
// itemscontrolのitemscontainerを探す方法がよくわからない
var container = VisualTreeHelperExtension
.Ancestors(AssociatedObject)
.OfType <UIElement>()
.TakeUntilButNotIncluding(x => x is Canvas)
.LastOrDefault();
if (container == null)
{
return;
}
Canvas.SetLeft(container, Math.Max(0, Canvas.GetLeft(container) + e.HorizontalChange));
Canvas.SetTop(container, Math.Max(0, Canvas.GetTop(container) + e.VerticalChange));
}
